package eu.hydrologis.geopaparazzi.dashboard.quickaction.dashboard;

import java.util.ArrayList;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
import android.widget.ImageView;
import android.widget.LinearLayout;
import eu.hydrologis.geopaparazzi.R;

/**
 * Taken from http://www.londatiga.net/it/how-to-create-quickaction-dialog-in-android/
 * 
 * Popup window, shows action list as icon and text (QuickContact / Twitter app). 
 * 
 * @author Lorensius. W. T
 */
public class QuickAction extends CustomPopupWindow {
    private final View root;
    private final ImageView mArrowUp;
    private final ImageView mArrowDown;
    private final Animation mTrackAnim;
    private final LayoutInflater inflater;
    private final Context context;

    public static final int ANIM_GROW_FROM_LEFT = 1;
    public static final int ANIM_GROW_FROM_RIGHT = 2;
    public static final int ANIM_GROW_FROM_CENTER = 3;
    public static final int ANIM_AUTO = 4;

    private int animStyle;
    private boolean animateTrack;
    private ViewGroup mTrack;
    private ArrayList<ActionItem> actionList;

    /**
     * Constructor
     * 
     * @param anchor  {@link View} on where the popup should be displayed
     */
    public QuickAction( View anchor ) {
        super(anchor);

        actionList = new ArrayList<ActionItem>();
        context = anchor.getContext();
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        root = (ViewGroup) inflater.inflate(R.layout.quickaction, null);

        mArrowDown = (ImageView) root.findViewById(R.id.arrow_down);
        mArrowUp = (ImageView) root.findViewById(R.id.arrow_up);

        setContentView(root);

        mTrackAnim = AnimationUtils.loadAnimation(anchor.getContext(), R.anim.rail);

        mTrackAnim.setInterpolator(new Interpolator(){
            public float getInterpolation( float t ) {
                // Pushes past the target area, then snaps back into place.
                // Equation for graphing: 1.2-((x*1.6)-1.1)^2
                final float inner = (t * 1.55f) - 1.1f;

                return 1.2f - inner * inner;
            }
        });

        mTrack = (ViewGroup) root.findViewById(R.id.tracks);
        animStyle = ANIM_AUTO;
        animateTrack = true;
    }

    /**
     * Animate track
     * 
     * @param animateTrack flag to animate track
     */
    public void animateTrack( boolean animateTrack ) {
        this.animateTrack = animateTrack;
    }

    /**
     * Set animation style
     * 
     * @param animStyle animation style, default is set to ANIM_AUTO
     */
    public void setAnimStyle( int animStyle ) {
        this.animStyle = animStyle;
    }

    /**
     * Add action item
     * 
     * @param action  {@link ActionItem}
     */
    public void addActionItem( ActionItem action ) {
        actionList.add(action);
    }

    /**
     * Show popup window
     */
    public void show() {
        preShow();

        int[] location = new int[2];

        anchor.getLocationOnScreen(location);

        Rect anchorRect = new Rect(location[0], location[1], location[0] + anchor.getWidth(), location[1] + anchor.getHeight());

        root.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
        root.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

        int rootWidth = root.getMeasuredWidth();
        int rootHeight = root.getMeasuredHeight();

        int screenWidth = windowManager.getDefaultDisplay().getWidth();
        // int screenHeight = windowManager.getDefaultDisplay().getHeight();

        int xPos = (screenWidth - rootWidth) / 2;
        int yPos = anchorRect.top - rootHeight;

        boolean onTop = true;

        // display on bottom
        if (rootHeight > anchorRect.top) {
            yPos = anchorRect.bottom;
            onTop = false;
        }

        showArrow(((onTop) ? R.id.arrow_down : R.id.arrow_up), anchorRect.centerX());

        setAnimationStyle(screenWidth, anchorRect.centerX(), onTop);

        createActionList();

        window.showAtLocation(this.anchor, Gravity.NO_GRAVITY, xPos, yPos);

        if (animateTrack)
            mTrack.startAnimation(mTrackAnim);
    }

    /**
     * Set animation style
     * 
     * @param screenWidth Screen width
     * @param requestedX distance from left screen
     * @param onTop flag to indicate where the popup should be displayed. Set TRUE if displayed on top of anchor and vice versa
     */
    private void setAnimationStyle( int screenWidth, int requestedX, boolean onTop ) {
        int arrowPos = requestedX - mArrowUp.getMeasuredWidth() / 2;

        switch( animStyle ) {
        case ANIM_GROW_FROM_LEFT:
            window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
            break;

        case ANIM_GROW_FROM_RIGHT:
            window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right);
            break;

        case ANIM_GROW_FROM_CENTER:
            window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
            break;

        case ANIM_AUTO:
            if (arrowPos <= screenWidth / 4) {
                window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
            } else if (arrowPos > screenWidth / 4 && arrowPos < 3 * (screenWidth / 4)) {
                window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
            } else {
                window.setAnimationStyle((onTop) ? R.style.Animations_PopDownMenu_Right : R.style.Animations_PopDownMenu_Right);
            }

            break;
        }
    }

    /**
     * Create action list
     * 	 
     */
    private void createActionList() {
        View view;
        String title;
        Drawable icon;
        OnClickListener listener;
        int index = 1; // changed to 0 when removed slider grips

        for( int i = 0; i < actionList.size(); i++ ) {
            title = actionList.get(i).getTitle();
            icon = actionList.get(i).getIcon();
            listener = actionList.get(i).getListener();

            view = getActionItem(title, icon, listener);

            view.setFocusable(true);
            view.setClickable(true);

            mTrack.addView(view, index);

            index++;
        }
    }

    /**
     * Get action item {@link View}
     * 
     * @param title action item title
     * @param icon {@link Drawable} action item icon
     * @param listener {@link View.OnClickListener} action item listener
     * @return action item {@link View}
     */
    private View getActionItem( String title, Drawable icon, OnClickListener listener ) {
        LinearLayout container = (LinearLayout) inflater.inflate(R.layout.quickaction_item, null);
        ImageView img = (ImageView) container.findViewById(R.id.icon);
        // TextView text = (TextView) container.findViewById(R.id.title);

        if (icon != null) {
            img.setImageDrawable(icon);
        } else {
            img.setVisibility(View.GONE);
        }

        // if (title != null) {
        // text.setText(title);
        // } else {
        // text.setVisibility(View.GONE);
        // }

        if (listener != null) {
            container.setOnClickListener(listener);
        }

        return container;
    }

    /**
     * Show arrow
     * 
     * @param whichArrow arrow type resource id
     * @param requestedX distance from left screen
     */
    private void showArrow( int whichArrow, int requestedX ) {
        final View showArrow = (whichArrow == R.id.arrow_up) ? mArrowUp : mArrowDown;
        final View hideArrow = (whichArrow == R.id.arrow_up) ? mArrowDown : mArrowUp;

        final int arrowWidth = mArrowUp.getMeasuredWidth();

        showArrow.setVisibility(View.VISIBLE);

        ViewGroup.MarginLayoutParams param = (ViewGroup.MarginLayoutParams) showArrow.getLayoutParams();

        param.leftMargin = requestedX - arrowWidth / 2;

        hideArrow.setVisibility(View.INVISIBLE);
    }
}